Use a calculator when necessary to answer the following questions.Use a calculator when necessary to answer the following questions.
a. What is the p$K_a$ for each $K_a: 10^{-10} , 10^{-21}$ , and $5.2 \times 10^{-5}$?
b. What is the $K_a$ for each p$K_a$: 7, 11 , and 3.2?